And the Pentagon spokesman, Bryan Whitman, says the bombing also illustrates the difficulty of preventing such attacks, even in a secured area.

五角大楼发言人惠特曼说，爆炸也说明防范类似的袭击有多么困难，即使在安全地区。

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Bush made the remarks after the security situation in Baghdad sharply worsened as bombing and shootings soared by 40 percent in the Baghdad area in the past week.

布什是在上周巴格达范围内高达40%的区域发生了爆炸和枪击、巴格达的安全形势急转直下的情况下作出评论的。

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The operating area encompasses 10,200 square miles east of Fallon and features a 14,000-foot runway (the longest in the Navy), four bombing ranges, and an electronic warfare range.

位于法隆以东的训练场可使用面积超过10，200平方英里，有一条14，000英尺的跑道（这也是海军里最长的跑道），四个投弹区，以及一个电子战区。

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After the years of bombing, the area was scarred with huge gaping holes.

BBC: Afghanistan: Through veiled eyes

Other patients were also in the trauma area, separated by curtains, but there were no bombing victims there, the source said.

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The BBC's Jon Brain in Baghdad says the ambush happened during a night of tension in the area, as US troops continued their investigation into Thursday's bombing.

BBC: NEWS | Middle East | Iraqis protest at US 'terrorism'